Engine bed-plate



(No Model.)

, R. SCHEI'DLER.

ENGINE BED PLATE. N0. 333,342. Patented Dec. 29, 1885-.

N PETERS. Phomlmngnpnur: washing n. c.

NTTED STATES PATENT OFFICE.

REINHARD SCHEIDLEB, OF NEVARK, OHIO.

ENGINE BED-PLATE.

SPECIFICATION forming part of Letters Patent No. 333,342, dated December 29, 1885.

Application filed October 13, 1885. Serial No.179,793. (No model.)

To @ZZ whom imag concern:

Be it known that I, REINHARD SUI-IEIDLER, of Newark, in the county of Licking and State of Ohio, have invented certain new and useful Improvements in Combined Heater and Engine Bed-Plate; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in a combined heater and engine .bed-plate for a portable-engine; and'it consists in certain features of construction and in combination of parts hereinafter described, and pointed outin the claims.

In the accompanying drawings, Figure l is a side elevation of a boiler with myimproved heater and bed-plate attached. Fig. 2 is alongitudinal section on the line of z z, Fig. l, said section being. on a plane extending radially with the boiler. Fig. 3 is an elevation in transverse vertical section on the line of w m, Fig. 1. Fig. 4 is a view in perspective showing a portion of one of the laps of the boiler-plates where the bed-plate is located.

A represents the boiler, andB the combined heater and engine bed-plate. The part B on the side next the boiler is concaved to fit the boiler nicely around the edges of the heater,so as to prevent a current of air and consequent loss of heat between the boiler and heater. (See Fig. 8.) Imake the shell of the boiler of three sheets, with the middle sheet lapping inside the end sheets, as is customary in such boilers. The rivet-heads that come under the heater are usually countersunk flush with the face of the boiler, (see Fig. 4,) although the bed-plate might be countersunk so as to fit over the ordinary rivet-heads, if so preferred.

The edges of the outer plates at the seams under the heater are not beveled for calking, but socalled blind calking7 is employed-that is, the under edge of the outer sheet is calked or upset, leaving substantially square shoulders a on the boiler-sheets. The shoulders b of the bed-plate and heater are made to fit nicelybetween the shoulders a, by means of which the strain endwise caused by the motion of the engine is sustained by these abutting shoulders, thereby greatly relieving the bolts C, that secure the heater to the boiler. The

heater and bed-plate is provided with suitable iianges, legs, lugs, ears, or other suitable devices, D, through which the bolts C pass to secure the structure to the boiler.

Heretofore much difculty has been encountered in permanently securing such devices to the boiler, on account of the excessive strain brought to bear on the bolts by reason of the motion of the engine and the unequal expansion and contraction of the parts. By tting the shoulders b of the bed-plate between the edges of the boiler-sheet, as aforesaid, this difficulty is entirely removed; also, by reason of the bed-plate fitting the boiler, the boiler-sheets are prevented from buckling.

ally separated from the boiler far enough to clear the rivet-heads, the flanges, legs, or lugs only coming in contact with the boiler. This left a space usually from one-half to threefourths of an inch, through which a current of air,set in motion by the heat of the boiler,was continually passing. Such currents carry away much heat, the latter being entirely wasted. By fitting the heater and bed-plate to the boiler, as aforesaid, the engaging parts protect each other, so that thereis no radiation of heat from between these parts, and the heater is kept approximately at the saine temperature as the boiler. The result is, the feed-water is introduced into the boiler at a higher temperature than it would otherwise be, causing less expansion and contraction in the boiler, and avoiding the diastrous results of feeding cold or moderately-heated water into an overheated boiler caused by low water.

With this class of engines the heater and bed-plate were usu- As it is hardly practicable to make the entire under surface of the heater fit the boiler with such accuracy as is desirable,I leave the outer edges, b', a trifle full, and arrange lateral chipping-pieces b2 where the shoulders b abut the edges of the boiler-plates, and leave other chipping-pieces-forinstance, bs-if preferred. are slight. in thickness, and can be easily fitted accurately to the boiler.

What I claim isl. The combination, with a portable boiler, the outer sheets of which at the parts where the engine-bed is seated have square edges, of an engine bed-plate, the latter having shoulders to abut against the said edges of the boiler- IOO plates, the parts being arranged Isubstantiz'illy as indieated,whereby the end-thrust of the bedplate is sustained wholly or in part by the edges of the boiler-sheets, so as to relieve the securing-bolts from excessive strain.

2. The combination, with a portable boiler, of a combined engine bed-plate and heater, the body of therlatter having a oonoaved seat made to it the boiler, the parts beingarranged substantially as indicated, whereby the boiler and heater are kept at approximately the same temperature,thus avoiding an unequal expansion and contraction of the parts, and securing a degree of heat in the feed-water approximat ing the temperature of the Water in the boiler,

substantially as set forth. 

